用c语言编写一个五子棋

好的，以下是一个简单的五子棋 C 语言程序：

#include <stdio.h>

#define BOARD_SIZE 15

char board[BOARD_SIZE][BOARD_SIZE];

void init_board() {
    int i, j;
    for (i = 0; i < BOARD_SIZE; i++) {
        for (j = 0; j < BOARD_SIZE; j++) {
            board[i][j] = '+';
        }
    }
}

void print_board() {
    int i, j;
    printf("  ");
    for (i = 0; i < BOARD_SIZE; i++) {
        printf("%d ", i + 1);
    }
    printf("\n");
    for (i = 0; i < BOARD_SIZE; i++) {
        printf("%d ", i + 1);
        for (j = 0; j < BOARD_SIZE; j++) {
            printf("%c ", board[i][j]);
        }
        printf("\n");
    }
}

int check_win(int x, int y, char c) {
    int i, j;
    int count;
    // 检查横向
    count = 0;
    for (i = x - 4; i <= x; i++) {
        if (i < 0 || i + 4 >= BOARD_SIZE) {
            continue;
        }
        count = 0;
        for (j = i; j <= i + 4; j++) {
            if (board[y][j] == c) {
                count++;
            } else {
                break;
            }
        }
        if (count == 5) {
            return 1;
        }
    }
    // 检查纵向
    count = 0;
    for (i = y - 4; i <= y; i++) {
        if (i < 0 || i + 4 >= BOARD_SIZE) {
            continue;
        }
        count = 0;
        for (j = i; j <= i + 4; j++) {
            if (board[j][x] == c) {
                count++;
            } else {
                break;
            }
        }
        if (count == 5) {
            return 1;
        }
    }
    // 检查左上到右下
    count = 0;
    for (i = x - 4, j = y - 4; i <= x && j <= y; i++, j++) {
        if (i < 0 || i + 4 >= BOARD_SIZE || j < 0 || j + 4 >= BOARD_SIZE) {
            continue;
        }
        count = 0;
        for (int k = 0; k < 5; k++) {
            if (board[j + k][i + k] == c) {
                count++;
            } else {
                break;
            }
        }
        if (count == 5) {
            return 1;
        }
    }
    // 检查左下到右上
    count = 0;
    for (i = x - 4, j = y + 4; i <= x && j >= y; i++, j--) {
        if (i < 0 || i + 4 >= BOARD_SIZE || j >= BOARD_SIZE || j - 4 < 0) {
            continue;
        }
        count = 0;
        for (int k = 0; k < 5; k++) {
            if (board[j - k][i + k] == c) {
                count++;
            } else {
                break;
            }
        }
        if (count == 5) {
            return 1;
        }
    }
    return 0;
}

int main() {
    int x, y;
    char c = 'X';
    init_board();
    print_board();
    while (1) {
        printf("请 %c 棋手输入坐标(x,y): ", c);
        scanf("%d,%d", &x, &y);
        if (board[y - 1][x - 1] != '+') {
            printf("该位置已经有棋子了！\n");
            continue;
        }
        board[y - 1][x - 1] = c;
        print_board();
        if (check_win(x - 1, y - 1, c)) {
            printf("恭喜 %c 棋手获胜！\n", c);
            break;
        }
        if (c == 'X') {
            c = 'O';
        } else {
            c = 'X';
        }
    }
    return 0;
}

注意：这只是一个简单的实现，还有很多可以改进的地方，比如：增加判断下棋位置是否越界的代码、增加判断和打印平局的代码、增加人机对战模式等等。